Lambda probe must delete and replace oxygen sensor emulator.

In this way the bike EFI will allow a greater flow of gasoline, you order with the new controller EJK.

Always remember that the Lambda sensor is a restrictor / gas fitter and is designed to provide a rather poor combustion, in order to reduce pollutant emissions covered. A motorcycle in which you want to get better performance necessarily have to have a mixture richer than ideal mixing ratio of low-CO2

Emulator PowerCommander


Or for example also:
Two 330 Ohms

 

Hi Jeff
Once again thank you for a pro explanation and pics.

I asked EJK manufacturers about the O2 sensor, and if my EFI automatically adjusts for mods, such as exhaust, airbox etc, and this is the answer I got from Matt Stoxen from Tech/R & D, Dobeck performance.

Quote
"The O2 sensor only works during light engine loads."
"Motorcycle EFI systems can only adjust for atmospheric changes (temperature and altitude) not volumetric air changes, like changing the exhaust and intake to flow more air. For an EFI system to be able to change for air volume changes it would to have a Mass Air Flow Sensor and they are very costly and big." End quote.

Does this means that EFI owners, like me, doing all these stage 1 mods, intakes, headers, Marcellino, slip ons etc. are ending up running dangerously lean, while thinking that the EFI magically fixes each new trick we perform.

 

Yep..!! Most peoples D-trackers/KLX's that have aftermarket exhausts & airbox modifications are running very lean!! If you can feel any heat from the engine when moving, then your very lean indeed. I'm riding in shorts, in Thailand hot weather & rich enough not to feel engine heat unlike other tricked-up D-trackers I have got the test ride. The EFI has a very basic monitoring system.

 

Modifying the airbox, exhaust system, mod Marcellinus, etc will not cause engine problems. The contribution of these modifications gasoline demand is not high and does not have to worry about. The ECU of the bike self-regulate these operations.
My bike currently has 20000km, of which 10,000 were performed with LeoVinci, kdx200 airbox, UNI filter, etc.. During that time I submitted the engine very great efforts of all kinds, highway, and especially narrow lanes own trial where the fan kept running and where I burnt the clutch plates, with temperatures over 30 degrees, and after all that I have never had the slightest problem.
Increases only when the engine is when you should seek ways to bring more gasoline.

 

All EFI that have a working O2 sensor connected introduce 2 values in the algorithm that determinates the duty cycle of the injector ( the quantity of fuel injected ) . These are short term and long term fuel trims . They can go up to 10 % each ( in a few systems up to 20 % each ) . In a normal system , with 10 % fuel trimm correction you can get up to 21 % more or less fuel accounting for whatever little mods you may have at the air filter , cams , header , exhaust ...
They are normally meant to compensate for the little differences in the calibration of the fuel injectors , the state of the air filter , fuel filter ( inside the fuel pump ) , etc.
Monitoring the O2 content in the exhaust is a sure way to get the mixture just right , 14.7 : 1 , the fuel trims remain enforced in WOT ( wide open throttle ) . It will not work with a radical mod : cylinder , different throttle body , you will need a different ECU if you are going that route .
The magic is called algorithm and it's implemented in the ECU firmware .
Joel , if you are running a rich mixture and/or have dissabled the air injection system it is only normal that you have a lower exhaust temperature , howewer that doesn't make it normal .

 

Marcelino, I'm only an very amateur mechanic & can only check my rich/lean levels by looking at my spark plug or if the engine is running to hot.

How are you getting on with the API programmable ECU?? Would love a Marcelino master class in what the thing can actually do, in the right hands!

 

Couple of conflicting points of view here. I almost shoved my snorkel back in after reading EJK explanation. Feel comforted that Jeff,s bike still going. Concerned by the heat I am feeling on my bare legs, thanks Joel. And then master Marcelino puts us all at ease. Nice to know you still with us.
In your opinion, will I get much out of this EJK piggyback controller, based on the free mods with slip on?

I assume if I go up to 300cc, the O2 sensor must go and EJK takes over ?

{ I just found out that my brother runs a Kawa shop in OZ and I can get stuff at cost. When he told me years ago he ran a bike shop, I thought he meant Bicycle.... }